A man taking the train to work one morning is overcome by melancholy memories and morbid fantasies.

Professor David Spiegelhalter tries to pin down what chance truly is and how it works in the real world. With his unique storytelling method, he applies a blend of wit and wisdom, animation, graphics, and gleeful nerdery to the joys of chance and the mysteries of probability. It is a vital branch of mathematics that tells us what might happen in the future based on the events of the past.